The headstock piece ball valve is a spherical hole, around the axis perpendicular to the channel rotation, so as to achieve the purpose of crossing gate.
球阀的启闭件是一个有孔的球体，绕垂直于通道的轴线旋转，从而达到启闭通道的目的。
Jim and Ellen walking down the path with mama at the door, waving like a mother, waiting until they are beyond the gate, forever worrying about crossing roads and unsuspected illnesses.
吉姆和埃伦走下门前的小路，妈妈站在门口挥手，像母亲在向一对儿女告别，直到他们远离了大门。 母亲心里永远有放不下的心事—交叉路口，突如其来的疾病。
Enter the gate Entering the gate, a cool oncoming wind crossing the hall makes me feel cool and fresh in this hot summer. The hall is wide and quiet.
《进入大门里面》刚进大门，一袭穿堂凉风迎面而来，在这样炎热盛夏，好不清爽！厅堂宽阔幽静！
Some of the main attractions include: Fisherman's Wharf, Chinatown, Alcatraz Prison, and crossing the Golden Gate Bridge.
一些主要景点包括：渔人码头、唐人街、恶魔岛监狱、还有穿越金门大桥。
Some of the main attractions include: Fisherman's Wharf, Chinatown, Alcatraz Prison, and crossing the Golden Gate Bridge.
一些主要景点包括：渔人码头、唐人街、恶魔岛监狱、还有穿越金门大桥。
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